My family often uses the expression "and then I found five dollars" to end a story that even the teller now realizes was rather pointless. The notion is to add a little (undeserved) punch.
A search on the internet shows that that usage is actually quite common, but I don't see any origin listed. Does anyone know where that usage originated and/or where it was popularized?
I tried looking via google ngram search
The earliest possible use I find is in a google books search, but I can't quite tell without more context. As a commenter points out this looks to be used in the actual sense but given that the questioner was frustrated I thought perhaps it could be an origin. Now that I see how hard it is to acquire that source, I rather doubt it had enough influence to start the expression anyway.